Definition of Protirozoic

(geology) of, or relating to the geologic eon from about 2,500 to 570 million years ago; comprises the Paleoproterozoic, Mesoproterozoic and Neoproterozoic eras; marked by the build up of oxygen in the atmosphere and the emergence of primitive multicellular life
(geology) the Proterozoic eon

- The Nuttall Encyclopedia

You arrived at this page by searching for Protirozoic
The correct Spelling of this word is: Proterozoic

Thank you for visiting FreeFactFinder. On our home page you will find extensive articles covering a wide range of topics.

Home | A to Z | About | Contact Us | Related Links